Description
- Model: Allen Bradley 1336-SN-SP10A (PCB P/N: 74101-363-51)
- Brand: Allen Bradley (Rockwell Automation – USA)
- Series: 1336 Plus / 1336 Plus II / 1336 Force / 1336 Impact
- Core Function: Remote I/O (RIO) Communication Interface via ScanPort
- Product Type: Communication Adapter Board
- Key Specs: Supports Universal Remote I/O (Blue Hose), 57.6k/115.2k/230.4k Baud
- Protocol: Allen Bradley Universal Remote I/O (RIO)
- Connection Port: Internal ScanPort connector (Attaches to drive control board)
- Data Rates: 57.6 kbps, 115.2 kbps, and 230.4 kbps (Switch selectable)
- Input Voltage: 5 V DC / 12 V DC (Derived from the host drive)
- Isolation: 500 V AC between RIO network and drive logic
- Indicators: Comm Status (Green/Red LED), Module Status (Green/Red LED)
- DIP Switches: Configuration for Rack Address, Starting Group, and Baud Rate
- Compatible Drives: 1336 Plus (SDR), 1336 Plus II (SBR), 1336 Impact, 1336 Force
- Wiring Terminal: 3-pin phoenix-style connector (Blue Hose: Data +, Data -, Shield)
- Operating Temp: 0 to 50 °C (32 to 122 °F)
ALLEN BRADLEY 1336-SN-SP10A 74101-363-51
Application Scenarios & Pain Points
The 1336-SN-SP10A is the bridge that allows a PLC-5 or SLC 500 controller to “talk” to a 1336 series AC drive over the classic “Blue Hose” Remote I/O network. In many aging plants, these drives are still the workhorses for pumps and conveyors. When this communication board fails, the PLC loses control of the drive speed and status, often resulting in a “Comm Loss” fault that shuts down the entire line.
Typical Application Scenarios:
- Food & Beverage – Conveyor Systems Centralized control of multiple 1336 Plus II drives from a single SLC 500 rack over a long-distance RIO network.
- Water/Wastewater – Pump Stations Remote monitoring of drive load, frequency, and fault status without running hundreds of discrete wires.
- Automotive – Paint Booths Integrating high-inertia fan drives into a legacy PLC-5 control architecture.
- Retrofit Maintenance Replacing a damaged comms board to avoid the massive cost of upgrading a perfectly functional drive to PowerFlex/Ethernet.
The “Ghost Fault” Trap: I’ve seen cases where a drive keeps tripping on “F71 – Net Loss.” Most guys replace the Blue Hose cable first, but if the vibration in the cabinet is high, the internal ScanPort ribbon connector on the 1336-SN-SP10A can develop micro-fractures. It looks fine, but the data drops for a millisecond and kills the process. Replacing the board is usually the only way to restore 100% uptime.
Compatible Replacement Models
The 1336 series used several communication adapters. Make sure you aren’t trying to swap RIO for DeviceNet by mistake.
| Original Model | Replacement Model | Compatibility | Main Difference | Impact |
| 1336-SN-SP10A | 1336-SN-SP10B | ✅ Direct Replacement | Newer PCB Revision | Plug & Play |
| 1336-SN-SP10A | 1203-GD1 | ⚠️ Hardware Compatible | Standalone Gateway | Requires external mounting |
| 1336-SN-SP10A | 1336-GM1 | ❌ Incompatible | Single-point RIO | Different software mapping |
Engineering Note: The 74101-363-51 number is the raw PCB part number. While useful for identification, always order by the 1336-SN-SP10A catalog number to ensure you get the full assembly including the mounting bracket and the correct firmware.
ALLEN BRADLEY 1336-SN-SP10A 74101-363-51
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relation to This Board | Quick Check | Action |
| COMM LED Off | No Network Activity | ✅ High | Check 82Ω or 150Ω resistor | Verify network termination |
| MOD LED Flashing Red | Board Self-Test Fail | ✅ High | Re-seat board into ScanPort | Replace board if fails again |
| “Net Loss” on Drive ODT | Intermittent Connection | ⚠️ Medium | Check ScanPort ribbon cable | Clean contacts/replace cable |
| Wrong Data in PLC | DIP Switch Mismatch | ⚠️ Medium | Verify Rack/Group settings | Match PLC I/O configuration |
Quality Assurance & Testing (Live Test Rig): Every 1336-SN-SP10A we supply undergoes a rigorous “Live Drive” test:
- Visual Scan: We inspect the PCB (74101-363-51) for any signs of heat stress or capacitor bulging.
- Comm Handshake: We install the board into a 1336 Plus II test drive and connect it to an SLC 5/04 RIO scanner.
- Load Simulation: We run the drive via the RIO network for 4 hours, monitoring for packet drops or CRC errors.
- DIP Switch Verification: We toggle all address switches to ensure the logic reads every bit correctly.
For current pricing and detailed manuals: Visit www.newplcdcs.com
Other Allen Bradley Inventory:
- 1756-L71 / L72 / L73 / L74
- 1747-L541 / L542 / L551
- 20-COMM-E (PowerFlex Ethernet)
- 1336-L6 (Control Board)
- 1771-ASB (Remote I/O Adapter)
- 2711P-T10C4D8 (PanelView Plus)
